# Principles

- [Contacts, Chatrooms & Customer Lifecycles](https://docs.saleschat.pro/principles/contacts-chatrooms-and-customer-lifecycles.md): This page describes Contact, Chatroom and their lifecycle as well as how to handle multiple Contacts with the same Phone Number
- [Multiple WABA & Phone Numbers](https://docs.saleschat.pro/principles/multiple-waba-and-phone-numbers.md): Multiple WABA accounts and Multiple Phone Numbers in each WABA account.
- [Sending messages via automation](https://docs.saleschat.pro/principles/sending-messages-via-automation.md): This section deals with automation in chats to send messages and run workflows.
- [Events & Attributes](https://docs.saleschat.pro/principles/events-and-attributes.md)
- [Attribute Matcher](https://docs.saleschat.pro/principles/attribute-matcher.md)
- [Apps on Saleschat](https://docs.saleschat.pro/principles/apps-on-saleschat.md)


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